Pulley-block.



PATBNTED NOV 1.3, 1906. JLBASS. I

PULLEY BLOCK. APPLIOATION FILED AUG. 15, 1906.

e 2 SHEETS-SHBET 1.

PATENTED NOV. 13

J. BASS. PULLEY BLOCK. APPLICATION FILED AUG.15,1906.

2 SHEETS-SHEET drwc niar John Bass.

UNITED STATES PATENT OFFICE.

JOHN BASS, OF MoKEES ROCKS, PENNSYLVANIA.

PULLEY-BLOCK- Application filed August 1 To all whom, it may concern;

Be it known that 1, JOHN BASS, a citizen of the United States of America, residing at McKees Rocks, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Pulley- Blocks, of which the following is a specification, reference being had therein to the accompanying drawings.

Thisinventionrelatesto sheave-blocks; and its primary object is to. provide a block with a gate to facilitate the lifting in and out of the cable, so that it need not be passed over the sheave end first.

A further object of the invention is to provide a block of strong and durable construction provided with a hinged gate and novel and effective means for securing the gate to the block. I

The construction of the improvement will be fully described hereinafter in connection with the accompanying drawings, which form part of this specification, and its novel features will be defined in the appended claims.

In the drawings, Figure 1 is a front elevation of a double sheave-block embodying the invention. Fig. 2 is an end view of the same. Fig. 3 is a central vertical section. Fig. 4 is a detail vertical section, on an enlarged scale, of the gate-locking device. Fig. 5 is a front elevation of a single block provided with my improvement. Fig. 6 is a side elevation thereof. Fig. 7 is a transverse vertical sectional view, and Fig. 8 is a section on the line 8 s of Fig. 5.

Referring to the'first four figures of the drawings, the reference-numerals 1 and 2 desinate two oppositel -disposed U-shaped metallic plates serving as the shell of the block, the inner wall 3 of each of said plates being extended upward and outwardly curved, as shown, to project through openings in the gate-block 4. The shell-plates 1 and 2 are separated by a spacing-plate 5, and to the outer walls of the shell are secured cheekpieces 6 and 7 by bolts 8 and tie-bolts 9, the latter extending through the cheek-pieces and shell and through filling-blocks 10 with- I in the U-shaped shell-plates.

The sheaves 11 and 12 are mounted upon a journal-pin 13, supported in bearings of cheek-pieces and extending through alining openings in the shell and spacing-plate. This pin 13 is secured at one end bya head 14, formed thereon, and at its opposite end by a cotter-pin 15.

Specification of Letters Patent.

Patented Nov. 13, 1906'.

5,1906. fierial No. 330,655.

the

From the upper edge of the outer wall of each of the shell-sections 1 and 2 project two parallel lugs 16, between which is pivotally secured the lower end of an arm 17bya pivotpin 18. These arms are formed with openings 17 a to receive the gate-block and are oppositely disposed, as shown, with their upper ends 19 turned outward at right angles to overhang the gate-block.

Each of the projecting ends 19 of the arms 17 is formed with an opening to receive the upper end of apin20, carrying at its lower end an angle-plate 21, serving as a latch. A coilspring 22 surrounds the pin 20, and the latch 21 is formed with an elongated slot 23, through which extends a screw 24, fitting a threaded opening in the arm and serving as a guide for the latch. The gate-block 4 is formed near each of its ends with a slot 25 to receive the lower ends of the spring-pressed latches, as best shown in Figs. 3 and 4. 25, secured to the arms 17, serve as housings for the springs 22.

To each of the pivoted arms 17 is secured a gate 26 by bolts 27, said gates forming extensions of the cheek-pieces when closed.

The gate-block 4 is provided with a central bearing 28 to receive the head 29 of the swivelhook 350 of the block.

The utility and operation of the device will be readily understood. By pressing upward on the latch-plates said lates are readily disengaged from the gatelock, permitting the gates to be swung outward for the admission of the ropes or cables, after which the gates are closed, the latches automatically rengaging the gate-block by the action of their springs.

The modification of the device shown in Figs. 5 to 8, inclusive, illustrates the invention a plied to a single sheave-block. In these gures the shell consists of only a single metallic U-shaped plate 1, having cheekpieces 6 and 7 bolted thereto. The upper edge of the shorter wall of the shell is formed with lugs 16 between which is pivotally secured an arm 17 ,carrying the gate 26. The gate-block 4 is shorter than the block 4 of the first four figures, and said gate-block carries the swivel 30.

The spring-latch 21 employed in this modification is the same as that already described, and it is obvious that the o eration of the improvement in the single sheave-block is the same as described in connection with the double block.

Spanner-plates The invention is susceptible of other modifications-as, for example, the wooden cheek-pieces shown might be omitted bymaking the shell heavier and constructing the block entirely of metal. I would therefore have it understood that the invention includes all such modifications and changes in construction as may fall within the terms and scope of the following claims.

What I claim, and desire to secure by Letters Patent, is-

1. A sheave-block comprising a metallic shell, provided with perforated lugs, an arm pivotally secured between said lugs, a gate secured to said arm, a gate-block supported on said shell, and having a slot to receive a latch, and a spring-pressedlatch-plate carried by said ar 2. A sheave-block comprising a U-shaped shell, a gate-block secured thereto, an arm pivotally secured to said shell, a gate secured to said arm, and a spring latch-plate carried by said arm, and adapted to engage within a slot in said gate-block.

3. A sheave-block comprising a U-shaped shell, an arm pivotally secured thereto, a gate-block secured to the shell, a gate secured to said arm, and a spring-pressed angle-plate carried by said arm, and adapted to enter a slot formed in said gate-block.

4. A sheave-block comprising a metallic shell, a gate-block secured thereto, an arm pivotally secured to the shell and having its upper end turned outward to overhang said gate-block, a gate secured to said arm, a

spring-pressed latch supported below the overhanging end of said arm and adapted to ally secured to the other wall of the s ell, a gate secured to said arm, and a spring latch device carried by said arm to engage within a slot formed in said gate-block.

tion with two oppositely-disposed U-shaped shell-plates having their inner walls extended above their outer walls, of a gate block through which said inner walls extend, oppositely-disposed arms pivotally secured one to the outer wall of each shell-plate, and having their upper ends turned outward and perforated, a gate secured to each of said arms, a spring-pressed latch for each of said arms having a pin extending throughthe perforations in the arms, said latches bein adapted to enter slots formed in said gate-b ock.

In testimony whereof I affix my signature in the presence of two witnesses.

. JOHN BASS. Witnesses:

F. O. MOOLEARY, MAX H. SROLOVITZ;

cured to one wall of the shell, an arm ipi-vota 7. In a double sheave-block, the combina- 

